【答案】:C 9、现有一循环队列,其队头指针为 front,队尾指针为 rear;循环队列长度为 N。其队内有效长度为( )(假设队头不存放数据)。 A.(rear - front + N)% N + 1 B.(rear - front + N)% N C.(rear – front)%(N + 1) D.(rear - front + N)%(N – 1) 【答案】:B 10、下列服务中,传输层使用UDP 的是( )。
【答案】:B 11、关系型数据库的特征包括( )。
【答案】:D 12、BGP runs over a reliable transport ( ). This eliminates the need to implement explicit update fragmentation, retransmission, acknowledgement, and ( ). Any authentication scheme used by the transport protocol may be used in addition to BGP's own ( )mechanisms. The error notification mechanism used in BGP ( )that the transport protocol supports a “graceful” close, ., that all outstanding data will be delivered (请作答此空)the connection is closed.